import yaml

import urllib.request, urllib.error, urllib.parse

from lxml import etree
import lxml.html
import lxml.html.soupparser




class membersParliamentCrawler(object):
    
    def __init__(self, configFile):
        
        with open(configFile, "r") as stream:
            try:
                self.config = yaml.safe_load(stream)
            except yaml.YAMLError as exc:
                print(exc)
  
    
    # input list of countries in form of ['nicaragua', 'honduras', .. , 'mexico']

    def downloadMemberListPagesOfCountries(self, listOfCountries):
        
        # download only html pages of the countries specified in input
        
        for country in listOfCountries:
            for key in self.config:
                if key in listOfCountries:
                    try:
                        memberList = self.config.get(key).get('memberList')
                    except:
                        print("There is a problem with the entry memberList in the config.yaml")
                    try:
                        memberListLink = memberList.get('link')
                    except:
                        print("No memberListLink defined in config.yaml")
                    print(memberListLink)
                    
                    
                    # download the html page of the List of Members                    

                    response = urllib.request.urlopen(memberListLink)
                    webContent = response.read().decode('UTF-8')

                    
                    # save interim results to files
                    
                    f = open('pages/' + key +'MemberList.html', 'w+')
                    f.write(webContent)
                    f.close

                    
    def parseMemberData2dictionary(self, listOfCountries):
        
        for country in listOfCountries:
            
            try:
                                
                #use soupparser to handle broken html
                
                tree = lxml.html.soupparser.parse('pages/' + country + 'MemberList.html')
                #for e in tree.iter():
                #    print(e.tag)
                
#                 for e in tree.xpath('//html//body//form//table//tr//td//table//tr'):
#                     
#                     #print(etree.tostring(e).decode())
                
                dictionaryMemberList = {}
                
                for n in range(len(tree.xpath('//html//body//form//table//tr//td//table//tr'))):
                    
                    name = tree.xpath('//html//body//form//table//tr//td//table//tr[' + str(n) + ']//td//a//text()')
                    link = tree.xpath('//html//body//form//table//tr//td//table//tr[' + str(n) + ']//td//a//@href')
                    
                    if len(name) > 0:
                    
                        dictionaryMemberList[name[0]] = {}
                        dictionaryMemberList[name[0]]['name'] = name[0]
                        dictionaryMemberList[name[0]]['link'] = link[0]
                        

            except Exception as e:
                
                print('parsing the html did not work. Possibly you first have to downloadMemberListPagesOfCountries(). The original error message is:', e)

            f = open('output/' + country +'MemberList.txt', 'w+')
            f.write(str(dictionaryMemberList))
            f.close